| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Materials Deposition by Cold Spray and Related Technologies
|
| Presentation Title |
Powder Surface Conditions in Cold Spray: What Single Particle Impact Studies Teach Us |
| Author(s) |
Christopher A. Schuh |
| On-Site Speaker (Planned) |
Christopher A. Schuh |
| Abstract Scope |
The surface conditions of cold-spray powders are pivotal to successful processing, because this is where bonding must occur and where flaws are born. Our group has explored the role of surface condition on impact bonding using laser-induced single-particle impact experiments. Our experiments to date span materials that range from highly reactive with tenacious native oxides (aluminum and its alloys), to noble metals effectively without native oxides (gold and silver), and conditions in-between (copper) where both oxides and other impurities are relevant to bonding. These explorations provide direct observations about how such layers hinder metallurgical bonding during impact events. By exploring the role of impact velocity on oxide rupture, delamination, an rarefication, we are able to develop a mechanistic understanding of the way in which strong bonds are formed, and to point to preferred conditions for processing. Practical implications for powder storage and heat treatment are also suggested. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, Powder Materials, Magnetic Materials |